linux-kernel - [PATCH 3/4] hwmon / gpio-fan: Use struct dev_pm

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Date:	Sat, 7 Jul 2012 23:05:28 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Linux PM list <linux-pm@...r.kernel.org>,
	Hans de Goede <hdegoede@...hat.com>,
	Alistair John Strachan <alistair@...zero.co.uk>,
	lm-sensors@...sensors.org, Jean Delvare <khali@...ux-fr.org>,
	Guenter Roeck <linux@...ck-us.net>,
	Kukjin Kim <kgene.kim@...sung.com>
Subject: [PATCH 3/4] hwmon / gpio-fan: Use struct dev_pm_ops for power management

From: Rafael J. Wysocki <rjw@...k.pl>

Make the gpio-fan driver define its PM callbacks through
a struct dev_pm_ops object rather than by using legacy PM hooks
in struct platform_driver.

Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
 drivers/hwmon/gpio-fan.c |   19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

Index: linux/drivers/hwmon/gpio-fan.c
===================================================================
--- linux.orig/drivers/hwmon/gpio-fan.c
+++ linux/drivers/hwmon/gpio-fan.c
@@ -503,10 +503,11 @@ static int __devexit gpio_fan_remove(str
 }
 
 #ifdef CONFIG_PM
-static int gpio_fan_suspend(struct platform_device *pdev, pm_message_t state)
+static int gpio_fan_suspend(struct device *dev)
 {
-	struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
+	struct gpio_fan_data *fan_data;
 
+	fan_data = platform_get_drvdata(to_platform_device(dev));
 	if (fan_data->ctrl) {
 		fan_data->resume_speed = fan_data->speed_index;
 		set_fan_speed(fan_data, 0);
@@ -515,27 +516,29 @@ static int gpio_fan_suspend(struct platf
 	return 0;
 }
 
-static int gpio_fan_resume(struct platform_device *pdev)
+static int gpio_fan_resume(struct device *dev)
 {
-	struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
+	struct gpio_fan_data *fan_data;
 
+	fan_data = platform_get_drvdata(to_platform_device(dev));
 	if (fan_data->ctrl)
 		set_fan_speed(fan_data, fan_data->resume_speed);
 
 	return 0;
 }
+
+static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
+#define GPIO_FAN_PM	(&gpio_fan_pm)
 #else
-#define gpio_fan_suspend NULL
-#define gpio_fan_resume NULL
+#define GPIO_FAN_PM	NULL
 #endif
 
 static struct platform_driver gpio_fan_driver = {
 	.probe		= gpio_fan_probe,
 	.remove		= __devexit_p(gpio_fan_remove),
-	.suspend	= gpio_fan_suspend,
-	.resume		= gpio_fan_resume,
 	.driver	= {
 		.name	= "gpio-fan",
+		.pm	= GPIO_FAN_PM,
 	},
 };
 

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